best coolant Ph level-??

[Russell]

What is the appropiate/best Ph level for BMW's coolant system?. It is my understanding this is very important for BMWs. Also, how can I test at home? Did not find anyting on ph levels in archives. Tried 3 different ways.

BTW, I use BMW blue with distilled water at all times. Been two years since changed.

TIA

[632 Regal]

you have the right mix, now you should be able to check the PH with a pool test kit... lol take it to a pool store and watch their reactions.

PS: pool store results are very innacurate, send me 250ml and I'll check it for you. I have a real test kit (165.00)

[Qube]

you have the right mix, now you should be able to check the PH with a pool test kit... lol take it to a pool store and watch their reactions.

PS: pool store results are very innacurate, send me 250ml and I'll check it for you. I have a real test kit (165.00)

Some litmus paper won't do enough for the cause? Might as well ask him to send his car for you to test, Jeff

I've got several packs of these lying around. Wonder if they go bad (must be at least 10 years old)

Have you ever used the voltmeter test?

One lead against ground, one lead inside the radiator antifreeze.
Anything over 0.25V MUST be renewed, the additives are worn out and
solution too acidic.

Anything under 0.25... good for at least a year. I change mine at
0.20 or so, but usually something else is wrong requiring channging
the fluid anyway.

Coolant is typically kept between a pH of 8-10, and most modern coolants nowadays are kept near a pH of 8.3. Anything lower and the coolant becomes acidic, which is not good for the metals in the engine. At that point it's time to replace the coolant.

[Blitzkrieg Bob]

If it tastes 2 years old, then change it.

[ryan roopnarine]

who the heck told you that ph mattered in an engine? you barely control the colligative properties of antifreeze mixture in a motor. factor in electrolysis, bad grounds, et cetera. its an impossible game. just make sure that the antifreeze is around a pH of 7 going in, and that the cold fluid in the expansion tank is above a pH of 6.2 and below 7.8 by the cheapest test method you can find.

if you are that concerned, check the ph, check the voltage, and/or replace it if its over 2 years old.

[Ross]

Which cellars best? Blue, green, yellow or orange?

[bigtisas]

I just tested the green coolant in my e34 using litmus paper. It's 9. The coolant is about 2 years old. Then, I tested the red coolant in my Toyota. It's about 7. The coolant is at least 5 years old. I'll test the coolant in my gfriend's 06 325i tonight. I'll post the test result.

BTW, the litmus paper I got can test ph range from 6 to 9. I bought it from ebay. It is originally for urine and saliva ph test.

[Blitzkrieg Bob]

Served at room tempurature.

[ryan roopnarine]

only jerks and idiots use antifreeze. i top up my coolant resivoir with md 20/20. mad dog.....it gives you wiiiinngssss

[Blitzkrieg Bob]

only jerks and idiots use antifreeze. i top up my coolant resivoir with md 20/20. mad dog.....it gives you wiiiinngssss

Gives you wings.

MD 20/20 gives you visions.